Sanofi (SAN)’s lotion Sklice, which as a tablet treated worms, wiped out head lice in a single application in a study that suggests the drug may offer a better approach than existing medications, researchers said.

A day after treatment, 95 percent of those in the Sklice group were lice free compared with 31 percent given a placebo, according to company funded-studies that helped gain the drug’s U.S. approval earlier this year. After two weeks, 74 percent of people given Sklice were lice-free, according to the research published today in the New England Journal of Medicine